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P24 · Lost alpha diagnostic based on an imaging bolometer and a multi-foil thermal detector

B. J. Peterson¹, A. G. Alekseyev², S. Konoshima³, N. Ashikawa¹, H. Parchamy¹, Y. Miura³, M. Sasao⁴

¹National Institute for Fusion Science, Toki, 509-5292 Japan
²Troitsk Institute for Innovation & Fusion Research, Troitsk, 142190 Russia
³Japan Atomic Energy Agency, Naka-shi, Ibaraki-ken 311-0193, Japan
⁴Tohoku University, Aoba, Aramaki, Sendai 980-8579, Japan

Abstract: The diagnosis of lost alpha particles is important for the operational safety and evaluation of an experimental fusion reactor. A radiation-hard diagnostic device has been proposed based on an imaging bolometer and a multi-foil thermal detector. In this paper we discuss ongoing work with testing prototype imaging bolometers on JT-60U and the testing of a prototype multi-foil thermal detector on an ion accelerator.

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